linux-kernel - [PATCH -mm 1/4] x86_64 boot: Add free_early to early reservation machanism

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1206601746.3067.21.camel@caritas-dev.intel.com>
Date:	Thu, 27 Mar 2008 15:09:06 +0800
From:	"Huang, Ying" <ying.huang@...el.com>
To:	"H. Peter Anvin" <hpa@...or.com>, andi@...stfloor.org,
	mingo@...hat.com, tglx@...utronix.de, Paul Jackson <pj@....com>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH -mm 1/4] x86_64 boot: Add free_early to early reservation
	machanism

Add free_early to early reservation mechanism.

Signed-off-by: Huang Ying <ying.huang@...el.com>

---
 arch/x86/kernel/e820_64.c |   17 +++++++++++++++++
 include/asm-x86/e820_64.h |    1 +
 2 files changed, 18 insertions(+)

--- a/arch/x86/kernel/e820_64.c
+++ b/arch/x86/kernel/e820_64.c
@@ -84,6 +84,23 @@ void __init reserve_early(unsigned long 
 		strncpy(r->name, name, sizeof(r->name) - 1);
 }
 
+void __init free_early(unsigned long start, unsigned long end)
+{
+	int i, j;
+	struct early_res *r;
+	for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
+		r = &early_res[i];
+		if (start == r->start && end == r->end)
+			break;
+	}
+	if (i >= MAX_EARLY_RES || !early_res[i].end)
+		panic("free_early on not reserved area: %lx-%lx!", start, end);
+	for (j = i+1; j < MAX_EARLY_RES && early_res[j].end; j++) ;
+	memcpy(&early_res[i], &early_res[i+1],
+	       (j-1-i) * sizeof(struct early_res));
+	early_res[j-1].end = 0;
+}
+
 void __init early_res_to_bootmem(void)
 {
 	int i;
--- a/include/asm-x86/e820_64.h
+++ b/include/asm-x86/e820_64.h
@@ -41,6 +41,7 @@ extern struct e820map e820;
 extern void update_e820(void);
 
 extern void reserve_early(unsigned long start, unsigned long end, char *name);
+extern void free_early(unsigned long start, unsigned long end);
 extern void early_res_to_bootmem(void);
 
 #endif/*!__ASSEMBLY__*/

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/